Lcd Interface Circuit (Refer To The - Panasonic JS-170FR Series Service Manual

2.1.7.2 LCD interface circuit (Refer to the page 4-4.)
In regard to the interface signals for the LCD, various signals on the main PWB are used in common and the loopback PWB is
used in order to enable connections with any type of the LCD. In this manner, LCD connections are modified.
The DSTN type color LCD calls for a volume control for brightness adjustment. Since the screen is divided, the upper screen
data (UD-7) and the lower screen data (LD-7) are output at the same time.
The TFT type color LCD has a single screen. Therefore, the display data are output for R, G, and B, respectively.
In the SM710, the meaning of the output data changes according to the LCD panel mode.
Pin name
FDATA23
FDATA22
FDATA21
FDATA20
FDATA19
FDATA18
FDATA17
FDATA16
FDATA15 (Note 1)
FDATA14 (Note 1)
FDATA13
FDATA12
FDATA11 (Note 1)
FDATA10 (Note 1)
FDATA9 (Note 1)
FDATA8 (Note 1)
FDATA7 (Note 1)
FDATA6 (Note 1)
FDATA5
FDATA4
FDATA3
FDATA2
FDATA1
FDATA0
(Note 1) According to the type of the LCD panel being connected, the resistor mounted on the PWB shall be changed.
18bit TFT
Not used
Not used
R5
R4
R3
R2
R1
R0
Not used
Not used
G5
G4
G3
G2
G1
G0
Not used
Not used
B5
B4
B3
B2
B1
B0
2-33
16bit DSTN
Not used
Not used
Not used
Not used
UD7
UD6
UD5
UD4
UD3
UD2
UD1
UD0
Not used
Not used
Not used
Not used
LD7
LD6
LD5
LD4
LD3
LD2
LD1
LD0